Hey, I like all your stuff :) I believe that what they meant was your shading is fine. You just haven't shaded the outline properly. Sounds confusing, yup. Well anyway, where the light spots are on the sprite, on the top of the wings, head etc. the outline should be a little darker than the light colour itself. Therefore, you will usually use the main colour of the thing your shading as the colour of the outline around the lighter colour. Then when the main colour has an outline, you usually use the darkest colour you used to shade the part for that. So on and so forth. Here, i sorta did it for you. (It was real quick though xD) I know I didn't have permission but yeah.